CN113766353B - Building intercom system and method thereof - Google Patents
Building intercom system and method thereof Download PDFInfo
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- CN113766353B CN113766353B CN202111157548.3A CN202111157548A CN113766353B CN 113766353 B CN113766353 B CN 113766353B CN 202111157548 A CN202111157548 A CN 202111157548A CN 113766353 B CN113766353 B CN 113766353B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
- H04Q5/24—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange for two-party-line systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
- H04M11/022—Paging systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
- H04M11/025—Door telephones
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Abstract
The application discloses building intercom system and method thereof, wherein the building intercom system comprises: the entrance machine and the indoor machine are connected through a bus, so that a mesh topology structure is formed; the door phone is used for acquiring the frequency points distributed by the corresponding indoor units before calling the indoor units, and adjusting the sending frequency points of the door phone according to the frequency points of the indoor units so as to send the calling data to the corresponding indoor units; and the indoor unit is used for receiving the call data sent by the door phone in the allocated frequency points and generating ringing according to the call data so as to wait for the user to answer. The method adopts mesh topology networking, any two devices in the network talkback, and cascade networking devices are not required to be added; the simultaneous talkback of a plurality of groups of two parties is not influenced mutually in a frequency modulation mode; the low-cost advantage of the analog intercom system is kept, and the safety is enhanced.
Description
Technical Field
The application relates to the technical field of building intercom systems, in particular to a building intercom system and a building intercom method.
Background
The residential community has the characteristics of centralized users, large capacity, unified security management and low economic income in most domestic and foreign areas, so that the security system of the residential community has to meet the requirements of safe, reliable, economical, effective and centralized management.
The building intercom system is divided into an analog transmission mode and a digital IP transmission mode:
1) The analog intercom system transmits analog voice signals by using a baseband to realize the communication between the door phone and the indoor phone or the communication between the indoor phones; the cost is much cheaper relative to a digital IP system; however, in the analog intercom system, the baseband is adopted to transmit the analog signal, the voice is not encrypted, only two terminals are allowed to be accessed into the bus for communication in the same time period, and the anti-interference capability is poor; other terminals are disabled from audio access, which would otherwise degrade bus impedance and compromise the call.
2) The digital IP intercom system converts the audio and video into an IP data packet, transmits the data packet in a network cable, optical fiber or PLC (power line carrier communication) mode and the like, and then recovers the audio and video to realize the intercom of the two parties. However, the digital IP intercom system adopts a data packet transmission mode, so that the simultaneous intercom of the other party can be realized, but the cost is much higher than that of an analog intercom system, if equipment such as a switch is additionally arranged, the networking is complex, and the difficult problem of line transformation may be faced to the building inventory market with wired lines.
In sum, no suitable building intercom system can meet the use requirements of users at present.
Disclosure of Invention
The application provides a building intercom system, which aims to solve the problems that in the prior art, the building intercom system is complex in networking and easy to divulge a secret.
In order to solve the above technical problem, the present application provides a building intercom system, including: the entrance machine and the indoor machine are connected through a bus, so that a mesh topology structure is formed; the entrance machine is used for acquiring the frequency points distributed by the corresponding indoor machines before calling the indoor machines, and adjusting the sending frequency points of the entrance machine according to the frequency points of the indoor machines so as to send the calling data to the corresponding indoor machines; and the indoor unit is used for receiving the call data sent by the door phone in the allocated frequency points and generating ringing according to the call data so as to wait for the user to answer.
Optionally, the door phone is further configured to detect whether the indoor unit to be called is communicating with other devices before sending the call data to the indoor unit, and if so, end the call; if not, adjusting the self sending frequency point according to the frequency point of the indoor unit.
Optionally, when the building intercom system is networked, the phone number of the door phone and the phone number of the indoor unit are used as codes, a frequency point distribution algorithm table is established according to the codes, and the frequency point distribution algorithm table is arranged in each door phone and each indoor unit of the networking; after the door phone and the indoor phone are powered on, the frequency point corresponding to each device in the building intercom system is obtained by inquiring the frequency point distribution algorithm table.
Optionally, the building intercom system further comprises a dynamic frequency point management machine; the dynamic frequency point management machine is used for informing the frequency points distributed by the door phone or the indoor unit accessing the bus through the public management frequency points when the door phone or the indoor unit accesses the bus.
Optionally, the dynamic frequency point manager is further configured to send, when the door phone calls the indoor unit, an inquiry request through the common management frequency point, so as to inquire a corresponding frequency point of the called indoor unit from the frequency point resource library, and notify the door phone of the corresponding frequency point.
Optionally, the dynamic frequency point manager is further configured to periodically query an online condition of each device that allocates a frequency point according to an occupation condition of the frequency point resource pool; if the equipment does not respond to the inquiry for many times, the equipment is judged to be disconnected, and the frequency point of the disconnected equipment is recovered.
Optionally, the building intercom system further comprises a standby management machine; the standby manager is used for sending a management request packet to the dynamic frequency point manager at regular intervals by using the public management frequency point, and if the standby manager does not receive responses for many times, the standby manager is switched to a main state; and after the standby management machine is switched to the main state, the frequency point resource allocation is carried out on the equipment in the building intercom system again.
In order to solve the technical problem, the application provides a building intercom method, which applies the building intercom system and comprises the following steps: the door phone obtains the frequency point distributed by the indoor unit to be called, and adjusts the sending frequency point of the door phone according to the frequency point of the indoor unit so as to send the calling data to the corresponding indoor unit; and the indoor unit receives the call data sent by the door phone in the allocated frequency points and generates ringing according to the call data to wait for the user to answer.
Optionally, before adjusting the sending frequency point of the indoor unit according to the frequency point of the indoor unit to send the call data to the corresponding indoor unit, the method further includes: detecting whether the indoor unit to be called is in communication with other equipment, and if so, ending the call; if not, adjusting the self sending frequency point according to the frequency point of the indoor unit.
Optionally, the obtaining, by the door phone, a frequency point allocated to the indoor unit to be called further includes: when a building intercom system is networked, the phone number of the entrance machine and the phone number of the indoor machine are used as codes, a frequency point distribution algorithm table is established according to the codes, and the frequency point distribution algorithm table is arranged in each entrance machine and each indoor machine of the networking; the door phone obtains the frequency points distributed by the indoor phones to be called by inquiring the frequency point distribution algorithm table.
The application provides a building intercom system and a method thereof, wherein the building intercom system comprises: the entrance machine and the indoor machine are connected through a bus, so that a mesh topology structure is formed; the door phone is used for acquiring the frequency points distributed by the corresponding indoor units before calling the indoor units, and adjusting the sending frequency points of the door phone according to the frequency points of the indoor units so as to send the calling data to the corresponding indoor units; and the indoor unit is used for receiving the call data sent by the door phone in the allocated frequency points and generating ringing according to the call data so as to wait for the user to answer. The method adopts mesh topology networking, any two devices in the network talkback, and cascade networking devices are not required to be added; the simultaneous talkback of a plurality of groups of two parties is not influenced mutually in a frequency modulation mode; the low-cost advantage of the analog intercom system is kept, and the safety is enhanced.
Drawings
In order to more clearly illustrate the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic block diagram of an embodiment of a building intercom system of the present application;
FIG. 2 is a schematic diagram of an embodiment of intercom communication between multiple pairs of devices at the same time in the present application;
FIG. 3 is a schematic topological diagram of an embodiment of a building intercom system of the present application;
FIG. 4 is a flow chart of an embodiment of the building talk-back method.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present application, the building intercom system and the method thereof provided by the present application are further described in detail below with reference to the accompanying drawings and the detailed description.
With the increasing number of residential houses, the property management of the residential areas becomes increasingly important. The management method for visitor registration and on-duty door watching is not suitable for the requirements of modern management on rapidness, convenience and safety. The building intercom system is formed by installing a doorway machine at a building entrance and an indoor machine at a user home and through a special network, so that a visitor can communicate with the user. When the visitor visits, the visitor can call the corresponding user through the entrance machine, and the user can remotely control the security door through the building entrance after confirming the identity of the visitor through the indoor machine, so that the convenience is improved, the personnel safety of the building is guaranteed, and illegal personnel are prevented from entering the security door.
Fig. 1 is a schematic structural diagram of an embodiment of the building intercom system, fig. 2 is a schematic structural diagram of an embodiment of intercom communication between multiple pairs of devices at the same time, and fig. 3 is a schematic structural diagram of an embodiment of the building intercom system.
In the present embodiment, the method includes: the entrance machine and the indoor machine are connected through a bus, so that a mesh topology structure is formed; the door phone is used for acquiring the frequency points distributed by the corresponding indoor units before calling the indoor units, and adjusting the sending frequency points of the door phone according to the frequency points of the indoor units so as to send the calling data to the corresponding indoor units; and the indoor unit is used for receiving the call data sent by the door phone in the allocated frequency points and generating ringing according to the call data so as to wait for the user to answer.
As shown in fig. 3, in the present embodiment, the portal phone and the indoor unit use mesh topology networking, and although they share the same bus medium for transmission, FM voice and RDS data are transmitted in a frequency division multiplexing manner, so that when any two devices perform intercom communication, the intercom communication of other devices is not affected.
As shown in fig. 2, 2m frequency points PM + RDS frequency division are multiplexed on the same cable, so that m opposite terminals can communicate without affecting each other. Using two frequency points FM _1 and FM _ A for the entrance machine A # and the indoor machine 1 #; using two frequency points FM _3 and FM _ B for the entrance machine B # and the indoor machine 3 #; the indoor unit 2# and the indoor unit n # use two frequency points FM _2 and FM _ n, and the simultaneous talkback communication of 3 pairs of equipment is realized. By analogy, the simultaneous talkback communication between m pairs of equipment can be realized by using 2m frequency points.
With reference to fig. 1, when the door phone calls the indoor unit, the frequency modulation frequency point allocated to the indoor unit can be obtained through fixed algorithm allocation or frequency point manager allocation. The fixed algorithm allocation of frequency points and the allocation of frequency point managers are further described as follows:
1) Fixed algorithm allocation
In the frequency point allocation scheme, the door phone and the indoor phone are respectively provided with fixed frequency points. Specifically, when the building intercom system is networked, the phone number of the door phone and the phone number of the indoor unit are used as codes, a frequency point distribution algorithm table is established according to the codes, and the frequency point distribution algorithm table is arranged in each door phone and each indoor unit of the networking, for example, the frequency point distribution algorithm table is integrated into software firmware of each single board of the system.
After the door phone and the indoor phone are powered on, the frequency point corresponding to each device in the building intercom system is obtained by inquiring the frequency point distribution algorithm table. After the power-on is started, the software acquires the receiving frequency point from the frequency point distribution algorithm table according to the number of the software and configures the receiving frequency point to a frequency modulation receiving chip; when calling, the software acquires the receiving frequency point of the opposite terminal from the frequency point distribution algorithm table according to the number information of the opposite terminal, and then configures the receiving frequency point to a frequency modulation sending chip;
2) Frequency point supervisor allocation
In the frequency point allocation scheme, the building intercom system also comprises a dynamic frequency point management machine; the dynamic frequency point manager can be a certain gate machine, an indoor machine or a special management unit in the system, and occupies the public management frequency point FM _0 to receive the management frequency point. Specifically, the functions of the dynamic frequency point manager may include: frequency point allocation, frequency point query and frequency point recovery.
Frequency point allocation: when the door phone or the indoor unit is accessed to the bus, the frequency point distributed by the door phone or the indoor unit accessed to the bus is informed through the common management frequency point.
Illustratively, when a device accesses the system bus, an RDS frequency point allocation request data packet is sent by using an FM _0 frequency point, and the frequency point manager allocates from the frequency point resource library, and informs the frequency point allocated by the requesting device by using the FM _0 or other public management frequency points.
And (3) frequency point query: when the door phone calls the indoor unit, the dynamic frequency point management machine sends a query request through the public management frequency point so as to query the corresponding frequency point of the called indoor unit from the frequency point resource library and inform the door phone.
Illustratively, when the device wants to call a target opposite terminal, the dynamic frequency point manager sends an RDS frequency point query request data packet at the FM _0 frequency point, and the dynamic frequency point manager queries from the frequency point resource library and informs the requesting device of the queried frequency point at the FM _0 or other public management frequency points.
Frequency point recovery: according to the occupation condition of the frequency point resource library, the online condition of each device for distributing the frequency points is inquired regularly; if the equipment does not respond to the inquiry for many times, the equipment is judged to be disconnected, and the frequency point of the disconnected equipment is recovered.
Illustratively, the dynamic frequency point management machine periodically inquires the online condition of each device for distributing frequency points according to the occupation condition of the resource library, if the inquiry is not responded for many times, the device is considered to be disconnected, and the frequency points are recycled to the resource library.
In other embodiments, the building intercom system further comprises a standby manager so as to perform frequency point management on switching between the main and standby machines. The frequency point management main and standby machine switching aims to solve the problem of manager failure, and when a main manager fails and cannot bear the frequency point management function, the manager in a standby state is switched to a main state.
The standby manager is used for sending a management request packet to the dynamic frequency point manager at regular intervals by using the public management frequency point, and if the standby manager does not receive responses for many times, the standby manager is switched to a main state; and after the standby management machine is switched to the main state, the frequency point resource allocation is carried out on the equipment in the building intercom system again.
Exemplarily, the standby manager sends a management request packet at an FM _0 public management frequency point RDS periodically, if no response is made by other managers, the standby manager indicates that the primary manager fails, and if no response is made in multiple attempts, the standby manager is switched to a primary state; and after the standby management machine is switched to the main state, carrying out frequency point resource reallocation, sending a frequency point reallocation notice to each machine of the system by each frequency point of the frequency point resource general table, shaking hands to obtain a newly allocated frequency point after the opposite end machine receives the notice, and synchronously finishing the updating of the frequency point resource table by the management machine.
It should be noted that the gate machine, the indoor machine, the dynamic frequency point manager and the standby manager of the networking are all devices in the building intercom system; besides the door phone can call the indoor unit, the devices in the building intercom system can call each other pairwise, for example, the indoor units call each other, at this time, the called device is called a calling device, and the called device is called a called device.
In order to resolve the conflict of multiple simultaneous calls to one called party, the building intercom system can also comprise a call conflict detection mechanism: before calling an opposite terminal, a calling device changes an FM receiving frequency point of the calling device into a frequency point of a called device so as to detect whether RDS data and FM voice data of the frequency point exist on a bus or not, and if yes, the opposite terminal is prompted to be busy; otherwise, the opposite terminal is idle, the calling party restores the self receiving frequency point, and then the RDS calling data packet is sent by the opposite terminal frequency point.
The building intercom system of the present application is further explained by taking one-time intercom as an example:
(1) when the entrance machine calls the indoor machine, firstly acquiring a frequency modulation frequency point distributed by an opposite end;
(2) the entrance machine modifies the frequency point of the receiving chip of the entrance machine into the receiving frequency point of the indoor machine to be called, and called conflict detection is carried out;
if the bus is checked to have the signal of the frequency point sent, the fact that other equipment is in talkback communication with the indoor unit is indicated, the other side is prompted to be busy, and if the frequency point is detected to be still occupied at intervals, the calling is finished;
if the sending of the signal of the frequency point is not detected, no frequency point conflict exists, and the subsequent calling step is continued;
(3) the door phone control circuit is configured with a sending frequency point of an FM sending chip to form a receiving frequency point of the indoor unit;
(4) the gate machine control circuit sends RDS data to the bus, and the data contains the calling receiving frequency point of the gate machine control circuit;
(5) the called indoor unit receives RDS control data at the own receiving frequency point, generates prompts such as ringing and waits for answering;
(6) the called indoor machine control circuit configures the frequency point of the FM transmitting chip to be the receiving frequency point of the door machine;
(7) the indoor machine control circuit of the called party sends RDS data to the bus and performs communication handshake with the door phone;
(8) after the called indoor unit answers, RDS data is sent to inform the gate unit to open the audio processing circuits of the two parties, and two occupied frequency modulation frequency points are used for talkback;
(9) after the talkback is finished, the two parties are handshake through RDS communication, the frequency modulation transmission is closed, and the standby state is entered;
the calling and talkback process between the indoor units is similar to that of calling the indoor units by the door phone.
In summary, the building intercom system of the embodiment adopts the same bus of frequency division multiplexing to realize mesh topology networking analog transmission; transmitting building talkback voice and control data by using an FM + RDS scheme; the method comprises two frequency modulation frequency point distribution schemes; the dynamic frequency point management machine can realize the functions of application, distribution, inquiry and recovery; the system also has a main/standby switching mechanism, a called party busy detection mechanism and a conflict back-off mechanism; the simultaneous talkback of a plurality of groups of two parties is not influenced mutually; the mesh topology networking is adopted, any two devices in the network talkback, and cascade networking devices are not required to be additionally arranged; the two-wire and four-wire simulation system stock market can be upgraded without line transformation; the low-cost advantage of the analog intercom system is kept, and the safety is enhanced.
Based on the building intercom system, the present application also provides a building intercom method, please refer to fig. 4, where fig. 4 is a schematic flowchart of an embodiment of the building intercom method, in this embodiment, the building intercom method may include steps S110 to S120, and each step is specifically as follows:
s110: and the door phone acquires the frequency points distributed by the indoor units to be called, and adjusts the sending frequency points of the door phone according to the frequency points of the indoor units so as to send the calling data to the corresponding indoor units.
S120: and the indoor unit receives the call data sent by the door phone in the allocated frequency points and generates ringing according to the call data to wait for the user to answer.
Optionally, before adjusting the sending frequency point of the indoor unit according to the frequency point of the indoor unit to send the call data to the corresponding indoor unit, the method further includes: detecting whether the indoor unit to be called is in communication with other equipment, and if so, ending the call; if not, adjusting the self sending frequency point according to the frequency point of the indoor unit.
Optionally, the obtaining, by the door phone, a frequency point allocated to the indoor unit to be called further includes: when a building intercom system is networked, the phone number of the entrance machine and the phone number of the indoor machine are used as codes, a frequency point distribution algorithm table is established according to the codes, and the frequency point distribution algorithm table is arranged in each entrance machine and each indoor machine of the networking; the door phone obtains the frequency points distributed by the indoor phones to be called by inquiring the frequency point distribution algorithm table.
The specific steps and principles of the building intercom method have been introduced in detail in the building intercom system, and are not described herein in detail, and specific reference may be made to the embodiment of the building intercom system.
The application provides a building intercom system and a method thereof, wherein the building intercom system comprises: the entrance machine and the indoor machine are connected through a bus, so that a mesh topology structure is formed; the entrance machine is used for acquiring the frequency points distributed by the corresponding indoor machines before calling the indoor machines, and adjusting the sending frequency points of the entrance machine according to the frequency points of the indoor machines so as to send the calling data to the corresponding indoor machines; and the indoor unit is used for receiving the call data sent by the door phone in the allocated frequency points and generating ringing according to the call data so as to wait for the user to answer. The method adopts mesh topology networking, any two devices in the network talkback, and cascade networking devices are not required to be added; the simultaneous talkback of a plurality of groups of two parties is not influenced mutually in a frequency modulation mode; the low-cost advantage of the analog intercom system is kept, and the safety is enhanced.
It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. In addition, for convenience of description, only a part of structures related to the present application, not all of the structures, are shown in the drawings. The step numbers used herein are also for convenience of description only and are not intended as limitations on the order in which the steps are performed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first", "second", etc. in this application are used to distinguish between different objects and not to describe a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (6)
1. A building intercom system comprising: the system comprises at least one door phone and at least one indoor phone, wherein the door phone and the indoor phone are connected through a bus so as to form a mesh topology structure;
the door phone is used for obtaining the frequency points distributed by the corresponding indoor units through fixed algorithm distribution or frequency point management machine distribution before calling the indoor units, and adjusting the sending frequency points of the door phone according to the frequency points of the indoor units so as to send calling data to the corresponding indoor units; wherein the fixed algorithm assignment comprises:
when the building intercom system is networked, the phone number of the door phone and the phone number of the indoor unit are used as codes, a frequency point distribution algorithm table is established according to the codes, and the frequency point distribution algorithm table is arranged in each door phone and each indoor unit of the networking;
after the door phone and the indoor phone are powered on, the frequency point distribution algorithm table is inquired to obtain the frequency point corresponding to each device in the building intercom system;
the dynamic frequency point management machine is used for informing the door phone or the indoor unit which is accessed to the bus of the distributed frequency point through a public management frequency point when the door phone or the indoor unit is accessed to the bus, and is also used for sending a query request through the public management frequency point when the door phone calls the indoor unit so as to query the corresponding frequency point of the called indoor unit from a frequency point resource library and inform the door phone;
and the indoor unit is used for receiving the call data sent by the entrance machine in the allocated frequency points and generating ringing according to the call data so as to wait for the user to answer.
2. A door entry system according to claim 1,
the door phone is also used for detecting whether the indoor unit to be called is in communication with other equipment or not before sending the calling data to the indoor unit, and if so, ending the calling; and if not, adjusting the self sending frequency point according to the frequency point of the indoor unit.
3. A door entry system according to claim 1,
the dynamic frequency point management machine is also used for periodically inquiring the online condition of each device for distributing frequency points according to the occupation condition of the frequency point resource library; if the equipment does not respond to the repeated inquiry, the equipment is judged to be disconnected, and the frequency point of the disconnected equipment is recovered.
4. A door entry system as claimed in claim 1 further comprising a standby supervisor;
the standby manager is used for sending a management request packet to the dynamic frequency point manager at regular intervals by using the public management frequency point, and if the standby manager does not receive responses for many times, the standby manager is switched to a main state;
and after the standby management machine is switched to the main state, the frequency point resource allocation is carried out on the equipment in the building intercom system again.
5. A building intercom method, wherein the building intercom system of any one of claims 1-4 is applied, the building intercom method comprising:
the method comprises the steps that a door phone obtains a frequency point distributed by an indoor unit to be called, and adjusts a sending frequency point of the door phone according to the frequency point of the indoor unit so as to send calling data to the corresponding indoor unit; when the building intercom system is networked, the phone number of the door phone and the phone number of the indoor unit are used as codes, a frequency point distribution algorithm table is established according to the codes, and the frequency point distribution algorithm table is arranged in each door phone and each indoor unit of the networking; the door phone acquires the frequency points distributed by the indoor phones to be called by inquiring the frequency point distribution algorithm table;
and the indoor unit receives the call data sent by the door phone in the allocated frequency points and generates ringing according to the call data to wait for the user to answer.
6. The building intercom method according to claim 5, wherein before adjusting the transmission frequency point of the indoor unit according to the frequency point of the indoor unit to transmit call data to the corresponding indoor unit, the method further comprises:
detecting whether the indoor unit to be called is in communication with other equipment or not, and if so, ending the call; and if not, adjusting the self sending frequency point according to the frequency point of the indoor unit.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1870741A (en) * | 2005-05-26 | 2006-11-29 | 陈建定 | Visual doorbell intercommunication system with wireless telephone function |
| CN101083575A (en) * | 2006-06-02 | 2007-12-05 | 同济大学 | Distributed speech communication system and network connection method for residential district |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107864413A (en) * | 2017-09-30 | 2018-03-30 | 深圳市艾特智能科技有限公司 | Building method of calling, device and storage medium |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1870741A (en) * | 2005-05-26 | 2006-11-29 | 陈建定 | Visual doorbell intercommunication system with wireless telephone function |
| CN101083575A (en) * | 2006-06-02 | 2007-12-05 | 同济大学 | Distributed speech communication system and network connection method for residential district |
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